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Sci Tran Med:发现新药物可使HIV患者存活更久、更健康!

2017-08-31 佚名 medicalxpress

科学家们可能已经发现了为什么艾滋病毒感染者为发展心脏病的可能性增加了一倍。匹兹堡大学疫苗研究与国家卫生研究院研究人员的研究结果也表明,一种实验性药物可能有希望作为潜在的治疗方法。

科学家们可能已经发现了为什么艾滋病毒感染者为发展心脏病的可能性增加了一倍。匹兹堡大学疫苗研究与国家卫生研究院研究人员的研究结果也表明,一种实验性药物可能有希望作为潜在的治疗方法。

科学家在今天的科学转化医学论文中解释说,增加的心脏病风险是由艾滋病毒感染者中的免疫细胞亚群所驱动,继续表达引发血液凝固和炎症的蛋白质。

此外,研究人员发现,Ixolaris是一种从蜱唾液中分离出来的,以前测试用于治疗动物血凝块的实验药物,成功地减少了感染了SIV(艾滋病毒灵长类动物)的猴子的炎症。

IvonaPandrea博士说:“抗病毒治疗方案取得了巨大进步,人们长期生活在艾滋病病毒感染中可能相安无事,然而由于心脏病的发生,这些生命正在缩短。皮特疫苗研究中心病理学教授说道:“通过发现驱动心脏病的细胞机制之一,我们可以寻找药物,如Ixolaris,专门针对和破坏这种机制。”

IriniSereti医学研究所测试了没有艾滋病毒感染者的血液样本,艾滋病毒感染者受到抗逆转录病毒治疗的控制。研究人员发现,越来越多的免疫细胞称为单核细胞,表现出高水平的“组织因子”蛋白质表达,与HIV感染者的血液中的血液凝固和其他炎症蛋白有关,无论其感染是否受到控制。

这些发现被Pandrea及其在猴子中的团队确认,感染SIV后进展为艾滋病。从不同种类的猴子分离的相同细胞通常在SIV感染时不会产生心脏病,不会产生组织因子,从而加强了这种破坏性蛋白质在HIV/SIV环境中触发心血管疾病的作用。

然后科学家将人血液样本暴露于Ixolaris,观察到药物阻断了组织因子的活性。在早期SIV感染期间在一小群猴子中进行测试时,治疗显著降低了与心血管疾病相关的炎症蛋白的水平。

NIH拥有Ixolaris的专利,Ixolaris是蜱蜱唾液中常见的鹿茸或黑色蜱的唾液中发现的一种小分子。需要更多的研究来测试药物的安全性和与用于艾滋病毒患者的其他药物的相互作用。研究人员还警告说,Ixolaris没有在人体中进行测试,结果可能不同。

潘德里亚说:“这种治疗方法有可能改善艾滋病毒感染患者的临床管理,并帮助他们生活更好,更健康的适应携带艾滋病毒的生活。“而且,通过靶向我们发现的炎症途径可能产生的其他治疗方法,是未来研究的重要途径。”

原始出处:

Melissa E. Schechter, Bruno B. Andrade, Tianyu He, et.al. Inflammatory monocytes expressing tissue factor drive SIV and HIV coagulopathy. Science Translational Medicine  30 Aug 2017

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    2017-09-20 bsmagic9140
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    2017-09-09 laoli

    学习了.谢谢分享!

    0

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目前市场上几乎没有专门针对HIV药物耐受性突变的遗传性测序技术,新加坡公司推出的全球首个测定HIV药物耐受性突变的NGS技术在帮助临床医生优化HIV治疗体系上扮演着重要的作用,同时其还可以帮助科学家们主动出击,最大化地减少全球抗逆转录病毒药物耐受性流行的发展。近日,这项技术在欧盟获批了临床(CE-IVD)。

中国人类免疫缺陷病毒感染的特殊群体抗病毒治疗专家共识

随着HIV感染基础及临床研究的进展,尤其是1996年开始的联合抗反转录病毒治疗(antiretroviral therapy, ART)广泛应用以来,HIV感染逐渐成为可防可治的慢性疾病。21世纪以来,全球HIV的感染率和艾滋病的病死率均逐步下降。我国HIV的防控亦取得了巨大的成就,截至2016年6月30日,我国累计治疗HIV感染者/艾滋病患者约52万例,正在治疗的患者约42万例。

eLife:与HIV病毒传播有关的蛋白质实际上对生育有好处!

在精液中发现的蛋白质片段,以前只知道它们能增强艾滋病毒感染的能力,也似乎在生殖生物学中扮演着重要的角色。来自格拉德斯通研究所、加州大学旧金山分校(UCSF)和德国乌尔姆大学的一组研究人员发现,这些碎片可以帮助处理受损或不需要的精子。

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